... free 2.Any size and color are OK 3.FDA,CE,LFGB,SGS approved non-toxic hookah silicone hose Advantages ... , radiation, cold, heat,Acid, Chemical(3). Stand wear and tear, anti-sepsis, Soft, arc resistance, corona resistance(4 ... and electronic automotive, medical and other mechanical products.(3)use for Pharmaceutical, Biotechnology, Food and Beverage ,Aerospace ,Cosmetic ,General laboratory etc. non-toxic ...